ACPI: video: Drop three redundant return statements

Signed-off-by: Clayton Casciato <majortomtosourcecontrol@gmail.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/acpi_video.c

@@ -1619,8 +1619,6 @@ static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
 		input_report_key(input, keycode, 0);
 		input_sync(input);
 	}
-
-	return;
 }
 
 static void brightness_switch_event(struct acpi_video_device *video_device,
@@ -1690,8 +1688,6 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
 		input_report_key(input, keycode, 0);
 		input_sync(input);
 	}
-
-	return;
 }
 
 static int acpi_video_resume(struct notifier_block *nb,
@@ -2308,8 +2304,6 @@ static void __exit acpi_video_exit(void)
 {
 	acpi_video_detect_exit();
 	acpi_video_unregister();
-
-	return;
 }
 
 module_init(acpi_video_init);